Feank pinch



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` I'. PINCE.

Ron PACKING. No. 374,905. Patented Dec. 13, 1887.

a longitudinal section.

l UNITED STATES PATENT Orr-ICE.

FRANK PINCH, OF SIDNEY, NEW YORK.

ROD-PACKING.

SPECIFICATION forming part of Letters Patent No. 374,905, dated December 13, 1887.

Application filed April 19, 1887. Serial No. 235,372. (No model.)

T o all whom it may concern:

Be it known that I, FRANK PINCH, of Sidney, in the county of Delaware and State of New York, have invented certain new and useful Improvementsin Rod-Packing,of which the following is a specification, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The object of the invention is to make a perfeet steam or water tight joint which shall be self-adjustable, to compensate for the settling of the rod consequent upon the wear of the bush-ring of the steamchest stufug-box; and the invention relates more particularly to a casing adapted for use with adjustable packing for valve and other rods.

In the accompanying drawings, Figure l is Fig. 2 is afront view, and Fig. 3 a rear View, ofthe invention.

Similar letters of reference indicate similar parts in the respective figures.

A is a casing, the rear part of which is grooved or channeled for the reception of the elastic packing a, which bears against the stufing-hox B of the Valvechest. The bushring of the stufngbox is shown by C. The valve-rod D, when in its normal position and before wear of the bush-ring C, is concentric or in line with t-he rear portion, b, of the case A, as shown in the drawings.

E shows any approved ring-packing which will adjust itself to the diameter of the rod by the action of the steam. I do not limitmyself to the construction of the ring-packing, as it may he of any 'suitable well-known character. The ringpaeking is held ,forward within the casing A by means of the spring F, which surrounds the rod.

It will be noticed, by reference to Fig. 3, that the lower front part, c, of the casing A is eccentric with the rear portion, d, or with the original or normal position. The said lower and forward part of the casing is provided with a space or chamber, e, of a length at least equal to the length of the ring-packing. The bore or hole in the front of the casing A is preferably oblong, as shown; but this is immaterial, as the opening is of such size as not to be in contact with the rod. t The inner face, f, of the casing A and the corresponding face of the ring g in front of the ring-packing are made steam-tight Aby grinding. e

It will be seen that by the reciprocating movement of the rod the bush-ring in the stutting-box of the steam-chest will be worn, and that unless provision is made whereby the rod may settle or fall the packing will come in contact with the casing and a steam-joint cannot be made. By the use of the chamber or space c the ringpacking can fall or settle, thus accommodating itself to the fall of the rod consequent upon the wear of the bush-ring.

This invention is therefore important in allowing the packing to be self-adjusting as the rod settles.

Having described my invention, I claim-- In a rod-packing device, the combination of the stuftingbox B, the casing A, and an adjustable ring -packing withiuthe casing adapted to surround t-he rod, the casing having the lower front chamber, e, eccentric with the rear portion, I), and of a length equal to that of the ring-packing, substantially as set forth.

In testimony whereofI have hereunto set my hand and seal.

FRANK PINCI-I. [L s] Witnesses:

GEORGE H. HOWARD, C. B. THoMPsoN.

longitudinal center of the rod when in its 

